- Rev-A-Shelf 544 Series is a premier pull out system for under sinks- 544 is a removable caddy and allows you to carry the entire pull out around the house- The adjustable handle and reversible/removable top tray accommodates plumbing fixtures- Easy installation by screwing the slide bracket to the base of the cabinet- Full extension Euro style slides are rated at 75 lb.- Door mount brackePacking & Sold In: Each.